Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions for Chemistry

How the following conversion can be carried out?

Propene to propan-1-ol

How the following conversion can be carried out?

Benzyl alcohol to 2-phenylethanoic acid

How the following conversion can be carried out?

2-Methyl-1-propene to 2-chloro-2-methylpropane

How the following conversion can be carried out?

But-1-ene to n-butyliodide

A 10% solution (by mass) of sucrose in water has freezing point of 269.15 K. Calculate the freezing point of 10% glucose in water, if freezing point of pure water is 273.15 K.

(Given: Molar mass of sucrose = 342 g mol⁻¹, Molar mass of glucose = 180 g mol⁻¹)

What is the role of depressants in the froth floatation process?

How will you convert: Phenol to 2, 4, 6 − trinitrophenol?

Arrange the following in the increasing order of their pK_b values:

C₆H₅NH₂, C₂H₅NH₂, C₆H₅NHCH₃

Name the reagents used in the following reactions:

Write the structures of A, B and C in the following reactions :

In reference to Freundlich adsorption isotherm, write the expression for adsorption of gases on solids in the form of an equation.

Give the structures of A, B and C in the following reactions :

Which component of starch is a branched polymer of α-glucose and insoluble in water?

Give the structures of A, B and C in the following reactions :

Give the structures of A, B and C in the following reactions :

Write the principles of the following methods :

Froth floatation method

Account for the following:
Gabriel phthalimide synthesis is not preferred for preparing aromatic primary amines.

 Write structures of compounds A and B in each of the following reactions:

Arrange the following polymers in increasing order of their intermolecular forces: 
Polyvinylchloride, Neoprene, Terylene